Ashin Walpola
d107534eb2
obu-firmware builds against the vanetza-idf C-ITS library, which until now came from the colleague's microbu-esp32c5 tree beside the repository and was not tracked here, so a clone of this repository could not build the firmware it ships. The library alone is now part of obu-firmware, as obu-firmware/external/vanetza-idf: their external/vanetza-idf at commit cf4b99f, unchanged (9775 files; see its PROVENANCE.md). CMake takes it from there by default; -DVANETZA_IDF_DIR still points the build elsewhere. The rest of the colleague's tree (their own VAM firmware, PKI tooling, station-link Python tools, the V2X2MAP bridge) stays out of this repository and gitignored; nothing is pushed to their repository. NOTES.md, docs/06, TODO.md and the pcap verifier's usage line point at the new location.
76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
#ifndef CBR_AGGREGATOR_HPP_VUGJW6BW
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#define CBR_AGGREGATOR_HPP_VUGJW6BW
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#include <vanetza/dcc/channel_load.hpp>
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#include <vanetza/geonet/timestamp.hpp>
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#include <array>
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namespace vanetza
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{
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namespace geonet
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{
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class LocationTable;
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/**
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* CbrAggregator realises the CBR_G aggregation, originally specified by TS 102 636-4-2 V1.1.1
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* section 5.2.2 and carried forward by TS 103 836-4-2 V2.1.1 clause 5.3 (Release 2; the
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* five-step algorithm here, including using the previous cycle's local CBR in the final
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* max(), matches the current text exactly).
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*
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* Since this algorithm relies mainly on location table entries it is placed in the geonet module.
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*/
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class CbrAggregator
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{
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public:
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using ChannelLoad = dcc::ChannelLoad;
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CbrAggregator();
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/**
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* Get local channel busy ratio, i.e. CBR_L_0_Hop
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* \return CBR
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*/
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ChannelLoad get_local_cbr() const { return m_local_cbr[0]; }
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/**
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* Get one-hop channel busy ratio, i.e. CBR_L_1_Hop
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* \return CBR
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*/
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ChannelLoad get_one_hop_cbr() const { return m_one_hop_cbr; }
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/**
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* Get two-hop channel busy ratio, i.e. CBR_L_2_Hop
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* \return CBR
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*/
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ChannelLoad get_two_hop_cbr() const { return m_two_hop_cbr; }
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/**
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* Get global channel busy ratio
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* \return CBR
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*/
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ChannelLoad get_global_cbr() const { return m_global_cbr; }
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/**
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* Aggregate {1,2}-hop CBRs from received CBR values stored in location table
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* \parame local most recent local CBR measurement CBR_L_0_Hop
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* \param lt location table containing LocTEX_G5 entries
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* \param cbr_lifetime reject entries older than T_cbr
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* \param cbr_target reference value
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*/
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void aggregate(ChannelLoad cbr_local, const LocationTable& lt, Timestamp cbr_lifetime, ChannelLoad cbr_target);
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private:
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std::array<ChannelLoad, 2> m_local_cbr;
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ChannelLoad m_one_hop_cbr;
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ChannelLoad m_two_hop_cbr;
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ChannelLoad m_global_cbr;
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};
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} // namespace geonet
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} // namespace vanetza
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#endif /* CBR_AGGREGATOR_HPP_VUGJW6BW */
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